某新建110kV输电线路经过覆冰区（厚度10mm），上下层相邻导线间或地线与相邻导线间的最小水平偏移，下列哪些满足要求？（）

A.110kV，0.5m

B.220kV，1.0m

C.330kV，1.5m

D.500kV，2.0m

The term PROLONGED BLAST refers to（）.

A.a blast of from five to seven seconds' duration

B.a blast of from five to six seconds' duration

C.a blast of from four to six seconds' duration

D.a blast of from six to seven seconds' duration